c#打开颜色对话框

用button时间 调出颜色对话框来：

private void btnForeColor_Click(object sender, EventArgs e)
        {
            using (ColorDialog cdialog = new ColorDialog())
            {
                cdialog.AnyColor = true;
                if (cdialog.ShowDialog() == DialogResult.OK)
                {
                    this.b.ForeColor = cdialog.Color;
                    this.btnForeColor.BackColor = this.b.ForeColor;
                }
            }